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4.0 L engine swap (quick question)

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Old Feb 1, 2011 | 02:27 PM
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  #16  
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413maxwedge
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From: Upstate N.Y
Year: 2000.1999,1996
Model: Cherokee
Engine: 4.0
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Originally Posted by XxXJ99xX
Yes they are. If your going to get something from a newer xj then get something 97-99 they dont have head issues because they have a different casting. If you want the best go for a 99 if you can get the intake/head with it because it flows better then other years.
No the correct answer is from Mid 1999 thru early 2001.Number two all jeeps will have a head issue if they overheat bad enough.
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Old Feb 1, 2011 | 02:31 PM
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96_xj
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From: Gilbert AZ/Las Cruces NM
Year: 1996
Model: Cherokee
Engine: 4.0 upgraded
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Originally Posted by 413maxwedge
No the correct answer is from Mid 1999 thru early 2001.Number two all jeeps will have a head issue if they overheat bad enough.
correct. the 0331 head casting had an issue between the 3 and 4 cylinder. It would crack there because it was casted incorrectly.
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Old Feb 1, 2011 | 04:05 PM
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JeepingDan
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Year: 88
Model: Comanche (MJ)
Engine: 4.0 HO
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Your going to have to use the renix head because the ports are different
or else your gonna have computor problems.

Also I moved this to oem tech
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